<?php

namespace backend\controllers;

use backend\services\CategoryService;
use Yii;
use backend\models\Category;
use backend\models\CategorySearch;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;

/**
 * CategoryController implements the CRUD actions for Category model.
 */
class CategoryController extends AdminBaseController
{
    /**
     * @var \backend\services\CategoryService
     */
    public $service;
    /**
     * @inheritdoc
     */
    public function behaviors()
    {
        return [
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'delete' => ['POST'],
                ],
            ],
        ];
    }

    /**
     * action 之前就要执行的代码
     * @param \yii\base\Action $action
     * @return bool
     */
    public function beforeAction($action)
    {
        $this->service = new CategoryService();
        $this->service->searchField = 'name';
        return parent::beforeAction($action); // TODO: Change the autogenerated stub
    }

    /**
     *获取页面变量
     */
    public function getViewVars($view, $info)
    {
        $viewVar = [];
        switch(strtolower($view))
        {
            case 'edit':
                $categorys = $this->service->getListByLevel();
                foreach($categorys as $key => $category) {
                    $categorys[$key]['html'] = str_repeat('&nbsp;', intval($category['level'])).'|-'.$category['name'];
                }
                $viewVar['category'] = $categorys;
                break;
        }
        return $viewVar;
    }

    /**
     *导航设置
     */
    public function actionNav()
    {
        return $this->render('nav');
    }
    /**
     * Lists all Category models.
     * @return mixed
     */
    /*public function actionIndex()
    {
        $searchModel = new CategorySearch();
        $dataProvider = $searchModel->search(Yii::$app->request->queryParams);
        $CategoryService = new CategoryService();
        $categoryList = $CategoryService->getListByLevel();
        return $this->render('index', [
            'categoryList' => $categoryList,
            'searchModel' => $searchModel,
            'dataProvider' => $dataProvider,
        ]);
    }*/

    /**
     * Displays a single Category model.
     * @param integer $id
     * @return mixed
     */
    public function actionView($id)
    {
        return $this->render('view', [
            'model' => $this->findModel($id),
        ]);
    }

    /**
     * Creates a new Category model.
     * If creation is successful, the browser will be redirected to the 'view' page.
     * @return mixed
     */
    public function actionCreate()
    {
        $model = new Category();

        $CategoryService = new CategoryService();
        $categoryList = $CategoryService->getListByLevel();
        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['view', 'id' => $model->cat_id]);
        } else {
            return $this->render('create', [
                'categoryList' => $categoryList,
                'model' => $model,
            ]);
        }
    }

    /**
     * Updates an existing Category model.
     * If update is successful, the browser will be redirected to the 'view' page.
     * @param integer $id
     * @return mixed
     */
    public function actionUpdate($id)
    {
        $model = $this->findModel($id);

        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['view', 'id' => $model->cat_id]);
        } else {
            $CategoryService = new CategoryService();
            $categoryList = $CategoryService->getListByLevel();
            return $this->render('update', [
                'model' => $model,
                'categoryList' => $categoryList,
            ]);
        }
    }

    /**
     * Deletes an existing Category model.
     * If deletion is successful, the browser will be redirected to the 'index' page.
     * @param integer $id
     * @return mixed
     */
    public function actionDelete($id)
    {
        $this->findModel($id)->delete();

        return $this->redirect(['index']);
    }

    /**
     * Finds the Category model based on its primary key value.
     * If the model is not found, a 404 HTTP exception will be thrown.
     * @param integer $id
     * @return Category the loaded model
     * @throws NotFoundHttpException if the model cannot be found
     */
    protected function findModel($id)
    {
        if (($model = Category::findOne($id)) !== null) {
            return $model;
        } else {
            throw new NotFoundHttpException('The requested page does not exist.');
        }
    }
}
